AR6201 - RT6201 - RCU6201 - AR6203
Page 2-64 DV 14307.03 Issue 1 09/2013
Problem Possible Reason Proposed Solution
Too high cabin noise
during intercom / transmit
operation.
The sensitivity of the
microphone input is too
sensitive.
Adjust the microphone
sensitivity to a higher
value to ensure the cabin
noise is reduced.
Recheck transmit operation
and/or Intercom function.
Refer to chapter 2.7.
Speaker output is not
working.
Speaker is switched off Switch Speaker “ON.
Refer to chapter 2.7.
The noise suppression
function of the squelch is
not working.
(Receiver noise is always
present).
Some avionic (especially
non ETSO/TSO approved
avionic) can produce
high electromagnetic
interference, which may be
received by AR6201-().
Reduce the interference
emitted by the avionic
around by improving
shielding, distance or
grounding.
The interference may also
be suppressed by adjusting
the squelch to a higher
value. Refer to chapter
2.7.
Note, that a higher value
will cause a reduced
sensitivity.
The display shows a
warning or failure message
(LOW BATT, STUCK PTT, TX
HOT, FAILURE)
Refer to “Warning and
Failure Indications” in
chapter 3.14
Refer to “Warning and
Failure Indications” in
chapter 3.14
The Antenna VSWR exceeds
3:1.
Possibly caused by a
defective or insufficient
counterpoise for the
antenna.
Check for sufficient size
of the counterpoise and
make sure there is no
mechanical defect on the
antenna.
The impedance of the
antenna cable deviates
significantly from 50
Ohm.
Make sure the used antenna
cable has 50
Ω impedance
and the cable is not
pinched or kinked on its
way from the radio to the
antenna
Faults on the BNC
connectors of the antenna
cable.
Check for proper
crimp/solder work on the
BNC connectors and rectify
as far as necessary.
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